Regulator for dynamo-electric machines



(No Model.)

J. W. LANGLEY.

REGULATOR FOE DYNAMO ELECTRIC MACHINES.

No. 303,866. Patented Aug. 19, 1884.

[Ill/III IINITED STATES PATENT OFFICEO JOHN IV. LANGLEY, OF ANN ARBOR,ASSIGNOR OF ONE-HALF TO GEORGE H. LOTHROP, OF DETROIT, MICHIGAN.

REGULATOR FOR DYNAMO- ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 303,866, dated August19, 1884. Application filed March 31, 1884. (N model.)

To all whom it may concern:

Be it known that 1, JOHN W. LANGLEY, of Ann Arbor, in the county ofVVasht enaw and State of Michigan, have invented a new and usefulImprovement in Regulators for Dynamo-Electric Machines, of which thefollowing is a specification.

Figure 1 is an end elevation; Fig. 2, a vertical section, and Fig. 3 anend elevation showing a modification of the device shown in Fig. 1.

My invention is an improvement upon the governor for dynamo-electricmachines described in Letters Patent No. 265,519, granted I 5 to me the8d of October, 1882 5 and it eonsistsin so connecting the arm whichcarries the commntator-brushes with the magnetic metal governing-plates,or one of them, that the movement of said plates will automaticallyshift 2 0 the brushes.

A 13 represent the poles of the magnets of a dynamo-electric machine; 00, two magnetic metal plates; D, the armature, and Ethe armatureshal't.

effect upon the machine is fully described in the patent abovementioned, so that I do not deem further description thereof necessaryhere.

L represents the ordinary commutator on the, armature-shaft, and Grepresents an arm for carrying the commutator-brushes H H, looselypivoted on the armature-shaft, the construction and arrangement of whichare well known.

I represents a pin, preferably made of brass, fastened to the edge ofplate 0, and projecting therefrom.

K represents a connecting-rod having a 0 slot in one end, through whichthe end of pin I plays, and also having therein a turn-buckle, J, orother equivalent device for varying its length. The other end of rod Kisfastened to arm G at one side of its center, and I preferto 5 make thisattachment by means of a slot in arm G, and a set-screw, as indicated inFig. 1, so that the relative movement of the connecting-rod and the.ends of arm G may be varied by shifting the point of connection betweenthem. This mechanism may be dupli- The operation of the plates 0 O andtheir cated, if desired, such duplication being shown in dotted lines inFig. 1. I

Prepresentsa spring, one end of which is attached to one end of arm G,the other end being fastened to any suitable point of attach 5 5 ment,and it serves to draw the end of arm G, to which itis attached, againsta stop, 0, fastened to one standard, N, of the machine, which should beso placed as to hold arm G in the position at which the brushes willmake 6 contact with the commutator in the proper places when the machineis doing its maximum work.

In the modification shown in Fig. 3 the arm R, which corresponds to theconnecting-rod K, has its lower end firmly clamped on the central hub ofarm G by the bolt S, and has in its upper endaslot, T, in which pin Iplays, the upper and lower portions of said slot being at differentangles, as shown. The arm It is made adjustable as to length by beingmade in two pieces and secured together by bolts which pass throughslots in one .or both pieces, as shown.

The operation of my invention isas follows: IVhen the work required ofthe dynamo is less than that for which it is adapted, the mag neticmetal plates 0 are attracted toward the poles of the magnets and weakenthe field ot' the magnets and the current generated by the 3 machine, asexplained in my patent above mentioned. Assuming that the brushes are intheir normal positions at the zero-points ot' the connnutator when themachine is exerting its maximum power, they will, when the field 8 ofthe magnets and the current is thus weakened by the plates 0, no longerbe at said zeropoints, for, the armature speed being practicallyconstant, the revolution of the commutator carries these points forward.As plates 0 G approach the poles A B, the pin I, when the arrangementshown in Fig. 1 is used, strikes the bottom of the slot in connectingrodK, force; this red downward, and swings arm G on its pivot (shaft E)against the re- 5 sistance of spring P, thus shifting the brushes N Nand bringing them in contact with the new zero-points on the commutator.When the plates G recede from the poles, arm G is swung in the oppositedirection by spring 1?, I00

until the brushes reassume their normal position.

\Vhen the invention is illiitl'lgfitl shown in Fig. 3, the Verticalmotion of pin I swings arm 11-, and thus moves arm G- in a manner thatwill be obvious to any mechanic. I prel'er to make the connectionbetween plate 0 and the arm which carries the commutatorbrushesadjustable, so that the arm may be set to move faster or slower than theplate, or a greater or less distance, or may remain sta tionary during aportion of the travel 01 the plate; and all these connections should bemade of some diamagnetie substance.

As a skillful mechanic can easily devise a number of modes of makingconnection between the plate 0 and arm (i, I do not wish to conlinemyself to any particular construct-ion ofthis connection.

\Vhatl claim as my invention, and desire to secure by Letters Patent, is

oted arm, substantially as and for the pur L poses set forth.

JOHN W. LANG HEY.

\Vitnesses;

O'r'rnan Eel-1n men, ERNEST D1 n'rnann.

